Prospects of North Korean Naval Nuclear Deterrent Forces - Piotrowski, Marcin Andrzej (Polski Instytut Spraw Międzynarodowych, 2017)
North Korea's ballistic missile and thermonuclear tests of 2017 are not the only ones on a list of potential threats. It is also mastering technologies necessary for nuclear deterrent forces based in part on submarines. This new qualitative threat requires closer cooperation between the U.S., South Korea, and Japan in missile defence and anti-submarine warfare